Means for preserving form rolls



March 4, 930. J c N 1,749,316

MEANS FOR PRESERVING FORM ROLLS Filed Sept. 10, 1923 Z'mpreu/aza @(lrui'er FMMMMMWMW MWAMM '45, and also between the ink cylinder and therarefied Ma... 4; 193o -j UNITED STAT S O E v JOSEPH 1?. oATL-IN, FPLAINFIELD, NEW JERSEY, ASSIGNOB TO ool) NEWSIPAPER,

' :MAGHINERY ooEroE TIoN, or NEW YORK, 'N. Y.,' A CORPORATION OFVIRGINIA MEANS Eon PRESERVING onM oLLs Application filed September 10,1923. Serial No. 661,926.

. i This'invention relates to the inking mechanism of a printing press.The principal ob- 'jects' of the inventionareto provide fo'r'in I:creasing thelife of the composition form rolls now universally used innewspaper printing presses. These rolls, being used con- 'stantly toconvey theink from the ink cylinder to the plate cylinder,are'considerably 1 I heated. When the temperature gets higher 0 than thecomposition of -which they are formed willstand they soften onthetsurfac'e and have to'be taken. out and recast. This delays theoperation of producing the news-' papers and involves expense andtrouble.

- Fig. 1 is a side viewpartly in section and partly diagrammatic of-partof a web perfecting press, showing a preferred embodi- 25 ment of thisinvention applied thereto;

s I Fig. 2 is a plan of the 'form' rolls thereof;

and V A I Fig. 3 is a view similar to Fig. 1 showinga modification.

I 80 I have shown the invention asapplied to a "press having platecylinders and impres- 'sion cylinders 11 arranged in the'usual way andsupplied with ink by a fountain roll 13 1 and ductor roll 17 I to theink cylinder 14:. 3,59:

Distributing rolls15 are shown as usual on theink cylinder and a .pairof'composition' form rolls 16for deliveringink from the ink cylinder totheplate cylinder- 1 againstthe melting down above mentioned,- simplyprovide for cooling their exterior vr surfaces constantly. This is donein the form aflattened pipe 9 between the'two form rolls I platecylinder. Thisis supplied'with air, gas

' or vapor under pressure through a pipe 8. "Thismay be of ordinarytemperature or may be cooled or refrigeratedto give a greater Theprincipal objectof this invention is toprovide for avoiding thisdifiiculty without I at the same time changing the composition -Thisinvention relates tosthe form rolls chiefly. For the purpose ofpreserving themshown in Figs. 1' and 2 by the provision ofcoolingefieot. The pipe 9 is provided with numerous perforations 7preferably in four rows. Two of them are arranged at the convexsides ofthe. pipe to direct blasts of air against the outside surfaces of theform rolls. The other two are located at the top and bottom to directair against the plate cylinder and ink'cylinder respectively. Thus thesurfaces which come in contact with the form rolls will also be cooled,so that, instead of increasing'the temperature of the form rolls bytheir contact'tlierewith they will tend to reduce it. I

This constitutes a very simple means for cooling these rolls and keepingthem cool so that they will retain-their original shape.

I In the form shown in Fig. 3 a slight modification is indicated. Herethe pipe 8 directs air, vapor, or carbonic acid gas under pressure intothe pipe 9 through an open tube 5, so that atmospheric air may beintroduced through them, induced by the current passing in. Otherwisethe conditions are the same as in Fig. 2. i a

7 Instead offorcing air in through the pipes 8 and 6 in any of theseforms different kinds of gases can be'used including gases which extractheat on expansion. Such gases being delivered under pressure will strikethe rolls and cool. them more rapidly than ordinary Although'I haveillustrated and described only two forms of this invention I am aware ofthe fact that modifications can be made therein byany person skilled inthe art without departing fromthe scope of the invention as expressed inthe claims. Therefore, I do not wish to be limited to any of the formsherein shown and described but what I do claim is form rolls contactingWith both and eno1os-- ing a space, of a cooling pipe extending along vi said space and perforated to directjets of cooling fluid against saidrolls.-

8. In a printing press the combination with the-two 'form rolls, ofa'nozzle-located in the space between said rolls and the :plate cylinderfor simultaneously cooling the. e217; terior 01 both of the form rollsand theplate cylinderwhilefthe form rolls 'are'in the act" oftransferring ink to said plate cylinder.

In testimony whereof I h ave hereuntoaf- I fixed my slgnature.

JOSEPH P. mm a I

